Nops Infrastructure Civil Site Engineer Interview Questions and Answers

Q1. Qty of cement in M25 grade concrete
Ans. 
The quantity of cement in M25 grade concrete is 350 kg/m³.
• M25 grade concrete has a mix proportion of 1:1:2 (cement:sand:aggregate).

• The total volume of concrete is taken as 1 m³.

• Therefore, the quantity of cement required for 1 m³ of M25 grade concrete is 350 kg.

• This is calculated by multiplying the volume of concrete by the proportion of cement in the mix.
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Q2. Exact weight of different dia of steel
Ans. 
The weight of steel varies with its diameter.
• The weight of steel can be calculated using the formula: weight = volume x density

• The density of steel is approximately 7850 kg/m³

• The volume of steel can be calculated using the formula: volume = pi x (diameter/2)² x length

• For example, a 10mm diameter steel rod with a length of 1 meter would weigh approximately 0.393 kg
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Q3. Process of waterproofing
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Waterproofing is the process of making a structure or object resistant to water penetration.
• Identify the areas that need waterproofing such as roofs, walls, and foundations.

• Clean and prepare the surface to be waterproofed.

• Apply a waterproofing membrane or coating such as bituminous, acrylic, or polyurethane.

• Ensure proper drainage and slope to prevent water accumulation.

• Test the waterproofing system for leaks and make n...read more
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Q4. Conversion of brass to Cum
Ans. 
Conversion of brass to Cum
• Brass is an alloy of copper and zinc, while Cum is not a known substance

• It is not possible to convert brass to Cum

• Perhaps the question is referring to a different substance or material
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STEEL WEIGHT, BBS,COVER BLOCK

Q1. LAYOUT, DRAWING READING
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Q1. What is the weight of one bag cement
Ans. 
The weight of one bag of cement varies depending on the country and type of cement.
• The weight of one bag of cement is typically between 25kg and 50kg.

• In the United States, a bag of Portland cement usually weighs 94 pounds (42.6kg).

• In Europe, a bag of cement typically weighs 50kg.

• Different types of cement, such as lightweight cement, may have different weights per bag.
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Q2. What is initial setting time of cement
Ans. 
Initial setting time of cement is the time taken for the cement paste to harden sufficiently to resist certain specified pressure.
• Initial setting time is an important property of cement as it determines the time available for mixing, placing, and finishing of concrete.

• It is measured by the Vicat apparatus, which consists of a needle and a mould filled with cement paste.

• The initial setting time is typically around 30 mi...read more
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Q3. What is the size of concrete cube
Ans. 
The size of a concrete cube refers to its dimensions, typically measured in millimeters.
• The size of a concrete cube is usually specified by the engineer or client.

• Common sizes for concrete cubes are 150mm, 200mm, and 300mm.

• The size of the cube is important for testing the compressive strength of the concrete.

• The cubes are typically cast and cured for a specific period before testing.
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Q4. What is the minimum diameter for doweals bar
Ans. 
The minimum diameter for dowel bars depends on the specific application and design requirements.
• The minimum diameter for dowel bars is typically specified in the project's design documents or specifications.

• It is important to consider factors such as the load transfer requirements, concrete strength, and spacing between dowel bars when determining the minimum diameter.

• In general, dowel bars for pavement joints are comm...read more
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Q1. What is the lap length of bars for compperision zone
Ans. 
The lap length of bars for compression zone is the minimum length required to ensure proper transfer of stress between two overlapping bars.
• The lap length is determined based on the diameter of the bars, concrete strength, and the bond strength between the bars and concrete.

• It is important to provide adequate lap length to prevent failure due to inadequate bond between the bars and concrete.

• The lap length for compressi...read more
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Q2. What is the minimum alowable ph value of water
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The minimum allowable pH value of water is 6.5.
• The minimum allowable pH value of water is determined by various regulatory bodies and standards.

• For drinking water, the World Health Organization recommends a minimum pH of 6.5 to prevent corrosion of pipes and plumbing fixtures.

• In some industrial processes, a minimum pH of 6.0 or even lower may be required.

• Water with a pH below the minimum allowable value may be consider...read more
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Q1. Just construction activities
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Q1. Just Salary negotiations
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Q1. Position and Salary Finalisation
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Q1. Self introduction
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Q2. Experience based
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Q1. Initial setting time of cement
Ans. 
Initial setting time of cement refers to the time taken for the cement paste to harden enough to resist certain pressure.
• Initial setting time is the time taken for the cement paste to harden enough to resist a certain pressure, typically 3.5 N/mm^2.

• It is an important property of cement as it determines the workability and strength development of concrete.

• The initial setting time of cement is usually around 30 minutes t...read more
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Q1. Bbs Billing Estimation Purchase
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